docs: add outbound file delivery guide - #143
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Related implementation hardening: https://gitlab.com/e-pilot/product/external-integrations/erp-integration-api/-/merge_requests/180 |
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CustomerRequestSubmitted reliability changes:
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added 2 commits
August 21, 2026 13:00
One binding for files: $file_data, always an array — the delivery's single
attachment when fanning out, every attachment when not. Replaces $item,
$file and $file_base64, and the {{ item.* }} / {{ file.* }} Handlebars
equivalents.
Removes the fields the API now rejects at save time, each naming its
replacement: fan_out.split_expression, file_source, shared, required_keys,
params_mapping, required_params, constants, lookups, upload.success_when
and upload.external_id. A 2xx from the last step is the delivery, so there
is no separate predicate re-judging it and no external id correlation hint
to promise.
Documents the per-step enabled expression and the skipped outcome it
produces, upload.max_total_bytes, the JSONata body (body_jsonata, or empty
to send the files unchanged), single-pass Handlebars for url and headers
with plain {{env.NAME}}, and the save-time rule that an upload may only be
bound to an event declaring event_attachments.
Every example is verified against the shipped contract: each JSONata
expression evaluates and passes the save-time binding check, and each
Handlebars path resolves against the delivery's template context.
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